Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: hamrtime on October 31, 2014, 08:12:29 PM

Title: fog/driving lamps and relay's
Post by: hamrtime on October 31, 2014, 08:12:29 PM: original fog lamps were 55w with a bosch relay,
does relay need to match lamps, like 100w lamps
will fry it or lights be dim or whats the scoop

thanks in advance
Title: Re: fog/driving lamps and relay's
Post by: Immortal on November 01, 2014, 09:28:30 AM: 100W will draw 8.3 amps on a 12v system. Size the relay to the amp draw.
Title: Re: fog/driving lamps and relay's
Post by: TL-Iguana on November 05, 2014, 05:27:34 PM: keep in mind you may need to also match the guage of wire going from the battery to the relay and the lamps. The switch in the jeep will not matter since it will not be taking the load.
Title: Re: fog/driving lamps and relay's
Post by: w squared on November 05, 2014, 07:56:52 PM: Quote from: Immortal on November 01, 2014, 09:28:30 AM
100W will draw 8.3 amps on a 12v system. Size the relay to the amp draw.

I didn't know that they taught Ohm's law in plumbing school.
Title: Re: fog/driving lamps and relay's
Post by: Immortal on November 05, 2014, 11:16:47 PM: Wouldn't know.
Title: Re: fog/driving lamps and relay's
Post by: Vinman on November 05, 2014, 11:17:08 PM: Quote from: w squared on November 05, 2014, 07:56:52 PM
I didn't know that they taught Ohm's law in plumbing school.

Thats only one letter short of homo's law.
Title: Re: fog/driving lamps and relay's
Post by: w squared on November 06, 2014, 09:26:23 AM: Quote from: Vinman on November 05, 2014, 11:17:08 PM
Thats only one letter short of homo's law.

That's why he's so good with it.
Title: Re: fog/driving lamps and relay's
Post by: Immortal on November 06, 2014, 05:56:31 PM: Says the guy who knew what it was.......